It is a rust brown color. I don't know the official MB name for the color and the online VIN decoder doesn't work for 1977 VIN's. If you look at:
http://www.peachparts.com/shopforum/sh...d.php?t=184225
There is a picture of the console and you can see part of the carpet color. The rest of the interior is about that color also.

The interior is what it is. There is a small puncture hole in the driver's seat and of course the seat springs could use some work. The carpet is shot, but all the plastics are good.

Let me know if you want some interior pics to show it better.

Glenn